Device for testing bonding strength of ardealite asphalt mortar

Abstract

The utility model provides a device for testing the bonding strength of ardealite asphalt mortar, and belongs to the technical field of interface bonding strength between road engineering material media. The phosphogypsum asphalt mortar bonding strength testing device comprises a testing mechanism and an adjusting mechanism, the testing mechanism comprises a testing box, a testing cavity is formed in one side of the testing box, a hot water tank is connected with a cold water tank, the testing box is installed at the top of the hot water tank, a hot air pipe is installed in the hot water tank, and a water heating rod is installed at the inner bottom of the hot water tank; a cold air pipe and a hot air pipe are installed in the cold water tank, drying filters are installed at one ends of the cold air pipe, a first connecting pipe is connected between the hot water tank and the cold water tank, first one-way valves are connected to the two ends of the first connecting pipe, and pipelines are connected between the first one-way valves and the corresponding drying filters. Therefore, the bonding strength of the asphalt mortar in different environments can be tested, and the effect of perfecting experimental data is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring the interface bonding strength between mediums of road engineering materials, and in particular to a device for testing the bonding strength of phosphogypsum asphalt mortar. Background Art

[0002] Phosphogypsum is a solid waste produced by phosphorus chemical companies in the process of phosphoric acid production. It is in powder form and is gradually being used by more and more research attempts to replace road fillers in highway projects. Asphalt mortar is a mixture of asphalt and filler in a heated and molten state. It is a component of asphalt mixture. Its main function is to bond coarse and fine aggregates and ensure the integrity of the mixture. Therefore, using phosphogypsum as a filler for asphalt mortar can reduce construction costs. But before that, it is necessary to test the bonding strength of asphalt mortar with phosphogypsum as filler.

[0003] In a basalt fiber and asphalt mortar interface bonding strength measuring device and testing method with publication number CN107817214B, the pull-out test measuring device includes an outer frame, a test mold, a pull-out testing machine, a tension sensor, a displacement sensor, a temperature control system and a data acquisition system. The testing method of the present invention is: prepare a basalt fiber asphalt mortar specimen, and cut off the exposed fibers at the non-tensile end. Fix the specimen, and adjust the height of the clamped basalt fiber. During the test, vertical loading is performed under fixed temperature conditions so that the basalt fiber moves downward at a constant rate. The tension change and the corresponding displacement change of the displacement sensor are collected, and the interface shear strength between the basalt fiber and the asphalt mortar medium is calculated based on the pull-out test statistical data. The device has a reasonable structure, is easy to operate, and the measurement results are reasonable and reliable, which helps to reveal the mechanism of action of basalt fiber reinforced asphalt binder from the perspective of materials science;

[0004] However, the device can only measure the bonding strength of asphalt mortar under specific environmental temperature and humidity. The bonding strength of asphalt mortar is different at different humidity and temperature. The bonding strength of asphalt mortar cannot be fully reflected only through the measurement of specific temperature and humidity. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a phosphogypsum asphalt mortar bonding strength testing device.

[0006] The utility model is achieved in this way:

[0007] The phosphogypsum asphalt mortar bonding strength testing device comprises a testing mechanism and an adjusting mechanism, wherein the testing mechanism comprises a testing box, a testing cavity is provided on one side of the testing box, the adjusting mechanism comprises a hot water tank and a cold water tank, the hot water tank and the cold water tank are connected, the testing box is installed on the top of the hot water tank, a hot air pipe is installed inside the hot water tank, a water heating rod is installed at the inner bottom of the hot water tank, a cold air pipe is installed inside the cold water tank, a drying filter is installed at one end of the hot air pipe and the cold air pipe, a first connecting pipe is connected between the hot water tank and the cold water tank, and the first connecting pipe is connected to the hot water tank and the cold water tank. Both ends of the connecting pipe are connected to a first one-way valve, and a pipeline is connected between the first one-way valve and the corresponding drying filter, an exhaust pipe is installed on the outside of the first connecting pipe, and a plurality of through holes are opened on the outside of the exhaust pipe, the other ends of the hot air pipe and the cold air pipe are respectively located on the outside of the hot water tank and the cold water tank, the inside of the hot water tank and the cold water tank are connected to a second connecting pipe, and the two ends of the second connecting pipe are respectively located inside the hot water tank and the cold water tank, a drain pipe is installed on the outside of the second connecting pipe, and the outside of the drain pipe is connected to a nozzle through a plurality of branch pipes, and the exhaust pipe and the nozzle are located in the test chamber.

[0008] The beneficial effect of adopting the above-mentioned further scheme is that both the hot water tank and the cold water tank are filled with cold water, and the water heating rod in the hot water tank can heat the cold water in the hot water tank. At this time, the air in the hot air pipe can be heated by hot water. When the hot air and the cold air enter the first connecting pipe, they will be mixed together. At the same time, the drying filter can dry the gas to remove the moisture therein. The first one-way valve prevents the gas from flowing back. The mixed gas will flow into the test cavity through the through hole to simulate a dry environment. At the same time, by adjusting the heating time and power of the water heating rod, the temperature of the hot air can be changed to adjust the temperature after mixing, thereby simulating a dry environment of different temperatures. At the same time, the second connecting pipe can mix hot water and cold water, and discharge the water through the nozzle to simulate a wet environment. At the same time, by adjusting the heating time and power of the water heating rod, the temperature of the hot water can be changed to adjust the temperature after mixing, thereby simulating a wet environment of different temperatures, and finally the bonding strength of the asphalt mortar under different environments is tested to achieve the effect of improving the experimental data.

[0009] Furthermore, a first air pump is installed on the outside of the hot water tank, and the output end of the first air pump is connected to one end of the hot air pipe, and the input end of the first air pump is connected to the first air inlet pipe. A second air pump is installed on the outside of the cold water tank, and the output end of the second air pump is connected to one end of the cold air pipe, and the input end of the second air pump is connected to the second air inlet pipe.

[0010] Furthermore, water pumps are installed inside the hot water tank and the cold water tank, and the output ends of a pair of water pumps are respectively connected to the two ends of the drainage pipe, and the input ends of the water pumps are connected to the conduit.

[0011] Furthermore, a second one-way valve is provided on the outside of the hot water tank and the cold water tank respectively, and a water inlet pipe is connected between the second one-way valve and the hot water tank and the cold water tank.

[0012] The beneficial effect of adopting the above further scheme is that the first air pump and the second air pump can make the gas flow in the hot air pipe and the cold air pipe and make it spray out from the through hole, the water pump can pump hot water and cold water into the second connecting pipe and make them spray out from the nozzle, and cold water is added to the hot water tank and the cold water tank through the water inlet pipe, and the second one-way valve prevents water from flowing back.

[0013] Furthermore, a waterproof hydraulic rod is installed on the top of the test cavity, a pull hook is installed on the telescopic end of the waterproof hydraulic rod, an electromagnet is installed on the bottom of the test cavity, a lower mold base and an upper mold base are provided inside the test cavity, and an iron block is embedded in the bottom of the lower mold base, a hanging ring is installed on the top of the upper mold base, the pull hook and the hanging ring are engaged, and the electromagnet absorbs the iron block.

[0014] The beneficial effect of adopting the above further scheme is that the phosphogypsum asphalt mortar can be applied to the top of the lower mold base, and the upper mold base can be covered on the lower mold base, so that the phosphogypsum asphalt mortar bonds the lower mold base and the upper mold base together, and then the lower mold base is fixed to the bottom of the test cavity using an electromagnet and an iron block, the hanging ring is hung on the hook, and the waterproof hydraulic rod is shortened to pull the upper mold base until it is separated from the lower mold base, thereby obtaining data on the bonding strength of the phosphogypsum asphalt mortar.

[0015] Furthermore, liquid level sensors are installed inside the hot water tank and the cold water tank, temperature and humidity sensors are installed on the side walls of the test chamber, and a control panel is installed on the front of the test box. The control panel is electrically connected to the temperature and humidity sensors, the waterproof hydraulic rod, the water pump, the first air pump, the second air pump, and the water heating rod.

[0016] The beneficial effect of adopting the above further scheme is that the liquid level sensor can monitor the water level in the hot water tank and the cold water tank, and reflect the result on the control panel to remind the user to add cold water in time. The temperature and humidity sensor can monitor the temperature and humidity in the test chamber, and reflect the result on the control panel. At the same time, the power and working time of the water pump, the first air pump, the second air pump, and the water heating rod are controlled by the control panel to change the flow of hot air or cold air or hot water or cold water, so as to change the temperature of the hot air and cold air after mixing, and the temperature of the hot water and cold water after mixing, so as to achieve the purpose of changing the humidity and temperature in the test chamber. At the same time, the discharge time of the mixed gas or liquid can be changed to change the saturation time, the water temperature circulation mode, and the air temperature circulation mode, so as to further enrich the experimental data.

[0017] Furthermore, a protective door is hinged on one side of the test cavity, a handle is installed on the outer side of the protective door, and light-transmitting glass is embedded on one side of the protective door.

[0018] The beneficial effect of the utility model is as follows: the phosphogypsum asphalt mortar bonding strength testing device obtained by the utility model through the above design, the hot water tank and the cold water tank are filled with cold water, and the water heating rod in the hot water tank can heat the cold water in the hot water tank, at this time the air in the hot air pipe can be heated by hot water, when the hot air and the cold air enter the first connecting pipe, they will be mixed together, and at the same time the drying filter can dry the gas to remove the moisture therein, and the first one-way valve prevents the gas from flowing back, and the mixed gas will flow into the test cavity through the through hole to simulate a dry environment, and at the same time, by adjusting the heating time and power of the water heating rod, the temperature of the hot air can be changed to adjust the temperature after mixing, thereby simulating dry environments of different temperatures, and at the same time the second connecting pipe can mix hot water and cold water, and discharge the water through the nozzle to simulate a wet environment, and at the same time, by adjusting the heating time and power of the water heating rod, the temperature of the hot water can be changed to adjust the temperature after mixing, thereby simulating wet environments of different temperatures, and finally the bonding strength of the asphalt mortar under different environments is tested to achieve the effect of improving the experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the following is a brief introduction to the drawings required for use in the implementation mode. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A first three-dimensional structural schematic diagram of the phosphogypsum asphalt mortar bonding strength testing device provided by the utility model;

[0021] Figure 2 A second three-dimensional structural schematic diagram of the phosphogypsum asphalt mortar bonding strength testing device provided by the utility model;

[0022] Figure 3 This is a front structural schematic diagram of a phosphogypsum asphalt mortar bonding strength testing device provided by the utility model;

[0023] Figure 4 A schematic diagram of the first cross-sectional structure of the phosphogypsum asphalt mortar bonding strength testing device provided by the utility model;

[0024] Figure 5 This is a schematic diagram of the second cross-sectional structure of the phosphogypsum asphalt mortar bonding strength testing device provided by the utility model.

[0025] In the figure: 100, test mechanism; 1001, test box; 1002, protection door; 1003, upper die base; 1004, lower die base; 1005, waterproof hydraulic rod; 1006, temperature and humidity sensor; 1007, control panel; 1008, handle; 1009, hook; 1010, hanging ring; 200, adjustment mechanism; 2001, hot water tank; 2002, cold water tank; 2003, water heating rod; 2004, first air pump; 2 005, first air inlet pipe; 2006, hot air pipe; 2007, second air pump; 2008, second air inlet pipe; 2009, cold air pipe; 2010, drying filter; 2011, first connecting pipe; 2012, first one-way valve; 2013, exhaust pipe; 2014, through hole; 2015, drain pipe; 2016, nozzle; 2017, second one-way valve; 2018, water inlet pipe; 2019, liquid level sensor; 2020, conduit. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1 of the utility model of the device for testing the bonding strength of phosphogypsum asphalt mortar

[0029] The utility model provides the following technical solutions: Figure 1-Figure 5, including a testing mechanism 100 and an adjusting mechanism 200, the testing mechanism 100 includes a testing box 1001, a testing chamber is provided on one side of the testing box 1001, the adjusting mechanism 200 includes a hot water tank 2001 and a cold water tank 2002, the hot water tank 2001 and the cold water tank 2002 are connected, the testing box 1001 is installed on the top of the hot water tank 2001, a hot air pipe 2006 is installed inside the hot water tank 2001, a water heating rod 2003 is installed at the inner bottom of the hot water tank 2001, a cold air pipe 2009 is installed inside the cold water tank 2002, a drying filter 210 is installed at one end of the hot air pipe 2006 and the cold air pipe 2009, the hot water tank 2001 A first connecting pipe 2011 is connected between the hot water tank 2001 and the cold water tank 2002, and both ends of the first connecting pipe 2011 are connected to a first one-way valve 2012, and a pipeline is connected between the first one-way valve 2012 and the corresponding drying filter 2010, an exhaust pipe 2013 is installed on the outside of the first connecting pipe 2011, and a plurality of through holes 2014 are opened on the outside of the exhaust pipe 2013, the other ends of the hot air pipe 2006 and the cold air pipe 2009 are respectively located on the outside of the hot water tank 2001 and the cold water tank 2002, and the inside of the hot water tank 2001 and the cold water tank 2002 are connected to a second connecting pipe, and the two ends of the second connecting pipe are respectively located on the hot water tank 2001 and the cold water tank 2002. , a drain pipe 2015 is installed on the outside of the second connecting pipe, and a nozzle 2016 is connected to the outside of the drain pipe 2015 through a plurality of branch pipes. The exhaust pipe 2013 and the nozzle 2016 are located in the test chamber. The hot water tank 2001 and the cold water tank 2002 are both filled with cold water, and the water in the hot water tank 2001 can heat the cold water in the hot water tank 2001 with the heating rod 2003. At this time, the air in the hot air pipe 2006 can be heated by the hot water. When the hot air and the cold air enter the first connecting pipe 2011, they will be mixed together. At the same time, the drying filter 2010 can dry the gas to remove the moisture therein, and the first one-way valve 2012 prevents the gas from flowing back. The mixed gas will flow into the test chamber through the through hole 2014 to simulate a dry environment. By adjusting the heating time and power of the water heating rod 2003, the temperature of the hot gas can be changed to adjust the temperature after mixing, thereby simulating dry environments of different temperatures. At the same time, the second connecting pipe can mix hot water and cold water, and discharge the water through the nozzle 2016 to simulate a wet environment. By adjusting the heating time and power of the water heating rod 2003, the temperature of the hot water can be changed to adjust the temperature after mixing, thereby simulating wet environments of different temperatures, and finally testing the bonding strength of asphalt mortar under different environments to achieve the effect of perfecting the experimental data.

[0030] Embodiment 2 of the utility model of the device for testing the bonding strength of phosphogypsum asphalt mortar

[0031] Reference Figure 1-Figure 5Specifically, a waterproof hydraulic rod 1005 is installed on the top of the test chamber, a retractable end of the waterproof hydraulic rod 1005 is installed with a hook 1009, an electromagnet is installed at the bottom of the test chamber, a lower die seat 1004 and an upper die seat 1003 are arranged inside the test chamber, and an iron block is embedded at the bottom of the lower die seat 1004, a hanging ring 1010 is installed on the top of the upper die seat 1003, the hook 1009 and the hanging ring 1010 are engaged, the electromagnet absorbs the iron block, and the phosphogypsum asphalt mortar can be applied to the lower die seat 1004. 04, and cover the upper mold base 1003 on the lower mold base 1004, so that the phosphogypsum asphalt mortar bonds the lower mold base 1004 and the upper mold base 1003 together, and then use an electromagnet and an iron block to fix the lower mold base 1004 to the bottom of the test cavity, hang the hanging ring 1010 on the hook 1009, and then shorten the waterproof hydraulic rod 1005 to pull the upper mold base 1003 until it is separated from the lower mold base 1004, thereby obtaining the bonding strength data of the phosphogypsum asphalt mortar.

[0032] Embodiment 3 of the utility model of the device for testing the bonding strength of phosphogypsum asphalt mortar

[0033] Reference Figure 1-Figure 5 Specifically, a liquid level sensor 2019 is installed inside the hot water tank 2001 and the cold water tank 2002, a temperature and humidity sensor 1006 is installed on the side wall of the test chamber, and a control panel 1007 is installed on the front of the test box 1001. The control panel 1007 is electrically connected to the temperature and humidity sensor 1006, the waterproof hydraulic rod 1005, the water pump, the first air pump 2004, the second air pump 2007, and the water heating rod 2003. The liquid level sensor 2019 can monitor the water level in the hot water tank 2001 and the cold water tank 2002, and reflect the result on the control panel 1007 to remind the user to add cold water in time. The temperature and humidity The sensor 1006 can monitor the temperature and humidity in the test chamber and reflect the result on the control panel 1007. At the same time, the control panel 1007 controls the power and working time of the water pump, the first air pump 2004, the second air pump 2007, and the water heating rod 2003, so that the flow rate of hot air or cold air or hot water or cold water changes, so as to change the temperature of the hot air and cold air mixed, and the temperature of the hot water and cold water mixed, so as to achieve the purpose of changing the humidity and temperature in the test chamber. At the same time, it can change the discharge time of the mixed gas or liquid to change the saturation time, the water temperature circulation mode, and the air temperature circulation mode, so as to further enrich the experimental data.

[0034] Specifically, the working principle of the phosphogypsum asphalt mortar bonding strength testing device is as follows: when in use, fill the hot water tank 2001 and the cold water tank 2002 with cold water in advance, start the water heating rod 2003, take out the upper mold base 1003 and the lower mold base 1004, apply the phosphogypsum asphalt mortar on the top of the lower mold base 1004, and cover the upper mold base 1003 on the lower mold base 1004, so that the phosphogypsum asphalt mortar will bond the lower mold base 1004 and the upper mold base 1003. The lower die base 1004 is then fixed to the bottom of the test chamber by using an electromagnet and an iron block, the hanging ring 1010 is hung on the hook 1009, and the waterproof hydraulic rod 1005 is shortened to pull the upper die base 1003 until it is separated from the lower die base 1004, thereby obtaining the bonding strength data of the phosphogypsum asphalt mortar, and then changing the temperature of the dry test chamber, that is, starting the first air pump 2004 and the second air pump 2007. At this time, the hot air pipe 2006 is filled with hot air. The air can be heated by hot water. When the hot air and the cold air enter the first connecting pipe 2011, they will mix together. At the same time, the drying filter 2010 can dry the gas to remove the moisture therein. The first one-way valve 2012 prevents the gas from flowing back. The mixed gas will flow into the test chamber through the through hole 2014. At the same time, by adjusting the heating time and power of the water heating rod 2003, the temperature of the hot air can be changed to adjust the mixed temperature, and the bonding strength of the phosphogypsum asphalt mortar is tested again. Finally, the humidity and temperature of the test chamber are changed, that is, the water pump is started to mix the hot water and the cold water in the second connecting pipe, and the water is discharged through the nozzle 2016 to simulate a humid environment. At the same time, by adjusting the heating time and power of the water heating rod 2003, the temperature of the hot water can be changed to adjust the mixed temperature, thereby simulating humid environments of different temperatures, and the bonding strength of the phosphogypsum asphalt mortar is tested again.

[0035] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Phosphogypsum asphalt mortar bonding strength testing device, characterized in that: The invention comprises a testing mechanism (100) and an adjusting mechanism (200), wherein the testing mechanism (100) comprises a testing box (1001), one side of which is provided with a testing cavity, and the adjusting mechanism (200) comprises a hot water tank (2001) and a cold water tank (2002), wherein the hot water tank (2001) and the cold water tank (2002) are connected, and the testing box (1001) is installed on the top of the hot water tank (2001). 1) is provided with a hot air pipe (2006), a water heating rod (2003) is provided at the inner bottom of the hot water tank (2001), a cold air pipe (2009) is provided inside the cold water tank (2002), a drying filter (2010) is provided at one end of each of the hot air pipe (2006) and the cold air pipe (2009), a first connecting pipe (2011) is connected between the hot water tank (2001) and the cold water tank (2002), and the first connecting pipe (2011) is provided between the first connecting pipe (2011) and the second ... first connecting pipe (2011) and the second connecting pipe (2011) and the second connecting pipe (2011) and the first connecting pipe (2011) and the second connecting pipe (2011) and the first connecting pipe (2011) and the second connecting pipe (2011) and the first connecting pipe (2011) and the second connecting pipe (2011) and the first connecting pipe (20 Both ends of the pipe (2011) are connected to a first one-way valve (2012), and a pipeline is connected between the first one-way valve (2012) and the corresponding drying filter (2010). An exhaust pipe (2013) is installed on the outside of the first connecting pipe (2011), and a plurality of through holes (2014) are opened on the outside of the exhaust pipe (2013). The other ends of the hot air pipe (2006) and the cold air pipe (2009) are respectively located on the hot water tank (2001) and the cold air tank (2009). The outside of the water tank (2002) is connected to the inside of the hot water tank (2001) and the cold water tank (2002) with a second connecting pipe, and the two ends of the second connecting pipe are respectively located inside the hot water tank (2001) and the cold water tank (2002). A drainage pipe (2015) is installed on the outside of the second connecting pipe, and the outside of the drainage pipe (2015) is connected to a nozzle (2016) through a plurality of branch pipes. The exhaust pipe (2013) and the nozzle (2016) are located in the test chamber.

2. The phosphogypsum asphalt mortar bonding strength testing device according to claim 1, characterized in that: A first air pump (2004) is installed on the outside of the hot water tank (2001), and the output end of the first air pump (2004) is connected to one end of a hot air pipe (2006), and the input end of the first air pump (2004) is connected to a first air inlet pipe (2005); a second air pump (2007) is installed on the outside of the cold water tank (2002), and the output end of the second air pump (2007) is connected to one end of a cold air pipe (2009), and the input end of the second air pump (2007) is connected to a second air inlet pipe (2008).

3. The phosphogypsum asphalt mortar bonding strength testing device according to claim 2, characterized in that: Water pumps are installed inside the hot water tank (2001) and the cold water tank (2002), and the output ends of a pair of water pumps are respectively connected to the two ends of the drainage pipe (215), and the input ends of the water pumps are connected to the conduit (220).

4. The phosphogypsum asphalt mortar bonding strength testing device according to claim 3, characterized in that: A second one-way valve (2017) is provided on the outside of the hot water tank (2001) and the cold water tank (2002), respectively, and a water inlet pipe (2018) is connected between the second one-way valve (2017) and the hot water tank (2001) and the cold water tank (2002).

5. The phosphogypsum asphalt mortar bonding strength testing device according to claim 4, characterized in that: A waterproof hydraulic rod (1005) is installed on the top of the test cavity, a draw hook (1009) is installed on the telescopic end of the waterproof hydraulic rod (1005), an electromagnet is installed on the bottom of the test cavity, a lower die seat (1004) and an upper die seat (1003) are arranged inside the test cavity, an iron block is embedded at the bottom of the lower die seat (1004), a hanging ring (1010) is installed on the top of the upper die seat (1003), the draw hook (1009) and the hanging ring (1010) are engaged, and the electromagnet absorbs the iron block.

6. The phosphogypsum asphalt mortar bonding strength testing device according to claim 5, characterized in that: The hot water tank (2001) and the cold water tank (2002) are both installed with liquid level sensors (2019), the side wall of the test chamber is installed with a temperature and humidity sensor (1006), and the front of the test box (1001) is installed with a control panel (1007), and the control panel (1007) is electrically connected to the temperature and humidity sensor (1006), the waterproof hydraulic rod (1005), the water pump, the first air pump (2004), the second air pump (2007), and the water heating rod (2003).

7. The phosphogypsum asphalt mortar bonding strength testing device according to claim 1, characterized in that: A protective door (1002) is hinged on one side of the test chamber, a handle (1008) is installed on the outer side of the protective door (1002), and a light-transmitting glass is embedded on one side of the protective door (1002).

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